Attachment for printing presses



Jan. l, 1935. c. GRILLO 1,936,531

ATTACHMENT FOR PRINTING missng Filed May 6, 1933 INVENTOR 67/44/6256 GIG/ 4 ATTORNEYS wnms; #7 I f Z/QBYVGD Patented Jan. 1, 1935 UNITED STATES "PATENT. oF E -CE i Ar'rnonmencr 1,986 631 roe PRINTING messes t i jCharlesgGrillo, Brooklyn; N. .Y. t t, 1' Application M yje,lseaseria ne.teats;

i 8 Claims. :(01: 1oi--25o i This invention relates to improvements 'in ,vention in itspreflerred form and following I printing presses and more particularly; it pertains to a new control mechanism for printing presses which mechanism will function totefiect an'automatic stopping of a printingpress under certain predetermined operating conditions i In certain types of printing xpresses,'-particu larly of the type wherein av type bed and-a re itating cylinder are reciprccated in opposite or irections to efiecta printing operation, it is highjly important that these movements maintain; a definite and fixed relation to one another *and unless this relation ismaintained, a successful printing operation cannotjbe had.

- :It is one object of the present invention to' improve the construction and mode of operation of printing machinesgof the afore mentioned type and toprovide such machines withmechanism which will effect a better printing operation thanprior machines. Y i t i uIn machines of thegeneral type mentioned, the cylinder is rotated duringwitsreciprocating movement in one direction while during its'ree iprocating movement in the oppositeidirection, Ithe cylinder is at :rest so fare-as rctationfis concerned. This operation requires that :theeylinder be connected and disconnected with. its driving means at proper intervals to producethe desired A feature Y of the present inventionresides 1 in a 'novelnontrol mechanismtfor automatically diskconnecting the-power and therebystopping the machine; if the :cylinder fails toyrotate-whenlit I is reciprocating in that direction -in which {it shouldzalso rotate.

Another feature of y the inten -en aside in a device which is simple in iits construction and cper'a'tion and which is'capableof attachment toma'chines which at present have certain ther of. .control which will operate independently of any controlling mechanisms with which a mav chine maybe equippedh Other features of the invention relate to certain novel and improved construetionsgarrangeinents andicombinations of partswhereinafter described Hand: particularly pointed 1011i :in 1; the

claims, theadvantages of which will be readily iinderstood' and "appreciated by thosewski11 d in the art. g t i 4 The invention will be clearly understood from detailed description of the constructions therein shown; -In the drawing,

Figure 1 is a fragmentary perspective view .of a printing press of n the reciprocating bed and cylinder type showing an attachment constructed in accordance with the ere w 1 i a t :Fignre 2 is a fragmentary View in end elevation thereon reciprocating bed and cylinder printing presspf the vertical type. In the drawing, -the reference numeral 10 designates the frame pf the-machine, 11 the cylinder; and 12 a portion of the; reciprocating cy1ind ercarriage.-, "If-he power-ion driving igure-5 is a vertical sectional view taken subpresent invention, applied :thei p fess is notshown, but the -press ;isconnecte d and disconnected with its power by means of a ,in-aFigure 1*. This lever Lhasaportion lewhich is received within ,anotch l5 ofvone arm pf the bell cranktlever 16,- theother arm LZ-t carrying an automatic 1 stop" latch 18;;the bell crank lever "beingpivcted upon a bolt orthe like- 19 attached to thef rame,;:10iof the press. 1S0 ,far' as' dec ibed, :thefi 'r a of c n e c ns ru t e ets e t i t at when amp ngages the; automatic stop latch l8, the power will be disconnected and;the,printing press will -be PPQB dii; I. These -printing presses have-a; control mechanism of the general type illustrated in Patent Number 1,582,576, April 27:, ;1;926,- which i mechlever, the upper portion 13 of which =is;illustrated I anism includes a pneumatic icyli nder 21 Within which reciprocates a; piston, not shown, therod 22 of which is-adapted to be projected to :a point where it willlengage the automatic stop latch 1 8 to 1 trip the-same under certain operating con- ,ditions. Leading "from the cylinder 21 there is a tsuitablepipe -2sr connected toavacuum mechanisrnf notlshcwn. This contrcl mechanism is .adaptedtostcp the printing press whencertain "q edii n xist i e t nsie fie le we as long as thevacuurn system is open the piston 'wilLbe retracted where its red 2 2cannot enga e :theautomaticstop. latch- 18. However, whenthe' A vacuum systemis; closed, the vacuum operates to project the piston; 22 to a" point where ,it; w i;ll

,machine.

tioned, are of conventional design and construcengage the automatic stop latch 18 and stop the These parts, like those before menmachines it does not always happen that this action takes place due to various reasons known to operators of these machines. The pneumatic control mechanism heretofore described does not take care of this situation and it often happens that the printing press is subjected to serious injury because of this fact. Y 'The present control mechanism is of the mechanical type and is adapted to effecta stopping of the machine in case the cylinder 11 thereof does not for any reason rotate during the interval when it should be rotating.

v """Ilief control mechanism herein is mounted upon the reciprocating cylinder carriage and consists of a plate having a central opening 31 which plate is adapted tobe attached to the outer end of the pneumatic cylinder 21 with which certain of said presses are already equippedby means of bolts or the like 32. These bolts 32 engage in openings already provided in the end of'the cylinder 21'. The plate 30 has an entension 33 andprojecting inwardly therefrom there is a bearing 34 which occupies a position substantiallyparallel with the pneumatio'cylinder 21'. Mounted within this bearing 34 there 'is'a trip member 35 having a right angular outer end 36. Carried by the inner end there is a dog er the like'37 which has a cut out portion 38 and this dog is so positioned that it will be closely adjacentthe end of the cylinder 11. The cutout "portion-38 receives a screw or the like 39 carried by the trip member'ss and this cut out portion and screw, 39 permit of a free movement of the dog'S'lin one directionbut will rotate the trip member 35 when the dog is moved in the oppo- "site direction. For example, the dog 37 may move upwardly as shownin dotted lines inFigur'e 4 without efiecting a rotating movement of the trip -member' 35. In moving downwardly,

however, the wall 41 of the cut out portion '38 will en'gagethe screw 39 and efiect a rocking of the trip member 35'to move its right angular end 36 from its normal horizontal position in which it is shown in dotted lines in Figure 1tothe position in which it is shown" in f'ullline's in Figure The referenc e' numeral 45 designates a mem-- b'er' attachedfto-"the end of the cylinder 11 and -said 'member has a head 46 provided with 'a qcurvedouter edge47; The parts are so"assembled that the'inember 45, when-the cylinder 11 is rdt'ated will engage the dog 3'7v and will rock the right angular end 36 of the trip member to the full linev position in which it is shown in Figure l, In full line position the right angular end 36'o'f the trip member 35 will freely pass the end 50 of the automatic stop latch 18 leaving the power connection intact, it being "understood that when the right angular end 36 1 is in' the dotted-line position in which itis shown v 2 -in Figure'l, upon-upward'movement of the type becl m' the right angular end 36 of the trip will engage the end 50 of the automatic stop latch, rock the bell crank lever and disconnect the power from the press.

The device operates in the following manner: With the parts in the position in which they are shown in Figure l, the type bed and cylinder are moving in opposite directions and the cylinder is rotating. As this'operation continues the member 45 will rotate and its curved edge 47 will rock the dog 37 and in turn operate the trip member 35 so that its right angular end 36 will not engage the end 50 of. the automatic stop latch 18. When, however, the cylinder for any reason does notrotate, the member 45 will not out portion 38 of the dog 3'7, thus insuring that this rear wall will always engage the screw 39 when the dog is rocked downwardly. In some :instances, with the power cut off, it may be de sirable to rotate the cylinder 11 in the opposite direction. When this happens the member 45 will engage the under side of the dog 37, moving the same to the dotted line position in which it isshown in Figure 4 and permitting the member 45 to move freely by the dog In some instances it may be desirable to render this mechanism inoperative and for this purpose, Iprovide a spring secured to a lug 61 projecting upwardly from the lug 33 in such a 'manner that when the right angular end 36 of the trip member 35 is moved upwardly into engagement with the spring, the spring will hold ,the same at all times out of the path of the end 50 of the automatic latch lever 18.

' I From the foregoing it will be apparent that the present invention provides a new and im proved control mechanism for printing presses which will act automatically to stop the machine 'in case the cylinder in its reciprocatingmovement is not also rotating.

Having thus described the invention, what. is

-' claimed as new and what it is desired to secure l? by Letters Patent of the United States,'is:

A stop for'printing presses of the rotating cylinder type, said stop comprising a power cutoff mechanism, means for tripping said power cut-ofi mechanism, and means for rendering said power cut-off tripping mechanism inefiective to cut off the power so long as the cylinder is frotating and depending upon non-rotation of the cylinder to render the power cut on effective.

-2 ."A"stop for printing presses of the type having a type bed and cylinder movable in opposite directions, a power cut-off mechanism, a trip for said power cut-off mechanism, said trip being carried by the type bed, and rotating means carried by the cylinder for moving said power cut-off trip mechanism to inoperative position upon rotation'of the cylinder.

'3. A stop for printing presses of the type hav- -inga'reciprocating type bed and a rotating cylindercomprising a power cut-01f mechanism, a

power cut-off trip mechanism carried by said reciprocating bed and normally movable thereby in the path of the power cut-on mechanism and means carried by the cylinder and operated thereby for moving said power cut-off trip" normallypositioned to engage the'power cute mechanism out of the path of the power cut-ofi mechanism. i x

4. A stop for printing presses of the type having a reciprocating type bed and a rotating cylinder including a power cut-.ofi mechanism, a power cut-off trip mechanism comprising a trip off mechanism, anda cam carried by the rotating cylinder and rotated therebyto engage and rock said trip to aposition where itwill'clear the power cut-off mechanism. i

5. In combination with a printing press, con-,

trol mechanism including a plate adapted for attachment to the printing press, a bearing carried by said plate, a rocking trip mounted in said bearing and normally positioned to engage a portion of said control mechanism, and means a ,for rocking said trip out of controhmechanism ed to engage and trip the power cut-ofi mechanism, and means for moving'said portion to a position to clear the power cut-off mechanism when the cylinder is rotating in proper timed relation with the movement of the reciprocating bed.

7. In a printing press including a reciprocating bed, a rotatingcylinder, a power cut-01f mecha nism, a mechanicalcontrol mechanism including.

a plate detachably mounted on. said printing press, a bearing projecting from said plate, a

rocking trip member mounted in said bearing andhaving a portionnormally positioned to engage and trip thefpower cut-ofi mechanism, and means for moving said portion out of position to engage the power cut-off mechanism when the cylinder is rotating in proper timed relation with the movement of the reciprocatingbed,

said last mentioned means being carried by the rotating cylinder.

8. r In a printing press including a reciprocating bed, a rotating cylinder, a power cut-off mechanism, a mechanical control mechanism including a plate detachably mounted on said printing press, a bearing projecting from said plate, a rocking trip member mounted in said bearing and having a portion normally positioned to engage and trip the power cut-off mechanism, and means I01 moving said portion out of position to engage the power cut-off mechanism when, the cylinder is rotating in proper timed relation with the movement of the reciprocating bed, said last mentioned means comprising a cam carried by the rotating cylinder.

30 CHARLES GRILLO. 

